1 research outputs found
Management of Potato virus Y (PVY–NTN) causing PTNRD disease in potato by prior treatment with a mild PVY strain
Potato virus Y (PVY) is one of the most destructive viruses infecting potato in Egypt and
worldwide. Recent research has shown that a necrotic PVY-NTN strain is infecting potato
in Upper Egypt. Chemical control is not effective to control this viral pathogen. An alternative
to control PVY infecting potato is using a mild PVY strain to elicit systemic cross
protection in potato plants against infection with a severe necrotic strain of PVY. Results of
this study showed that a PVY necrotic strain produced a significant lesser number of local
lesions on diagnostic plants (Robinia pseudoacacia L.) when these plants were treated first
with a mild PVY strain. Data obtained from greenhouse and field experiments indicated
that treatment of potato plants (variety Burna) with a mild PVY strain significantly protected
potato from infection with a severe necrotic PVY strain, and resulted in a significant increase
in tuber yield compared with infected plants without prior treatment with a mild
PVY strain. The highest increase in potato tuber yield was obtained when potato plants were
inoculated with a mild PVY strain 3 days before challenging with the severe necrotic PVY
strain. This study proved that using a mild strain of PVY can significantly protect potato
plants from infection with a severe strain of this virus under both greenhouse and field
conditions and can present a potential method to reduce losses due to infection of this virus
in Assiut governorate and Upper Egypt